| Here is a inexpensive ammonite of the genus Hecticoceras (Lunuloceras) sp. from the middle jurassic clay pits of Michailov in a concretion of pyrite. | |||
Location: | Michailov, Ryazon Region, Russland | ||
| Size: | about 28 mm | ||
| Age: | Upper Jurasic Jura, Callovian, (ca. 160 Ma) | ||